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Apache License
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/******************************************************************************* * Copyright 2011 See AUTHORS file.//from w ww . j a v a2 s .co m * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. ******************************************************************************/ package com.badlogic.gdx.physics.box2d; import com.badlogic.gdx.math.Vector2; /** * Callback class for ray casts. * * @see World#rayCast(RayCastCallback, Vector2, Vector2) * @author mzechner */ public interface RayCastCallback { /** * Called for each fixture found in the query. You control how the ray cast * proceeds by returning a float: return -1: ignore this fixture and * continue return 0: terminate the ray cast return fraction: clip the ray * to this point return 1: don't clip the ray and continue. * * The {@link Vector2} instances passed to the callback will be reused for * future calls so make a copy of them! * * @param fixture * the fixture hit by the ray * @param point * the point of initial intersection * @param normal * the normal vector at the point of intersection * @return -1 to filter, 0 to terminate, fraction to clip the ray for * closest hit, 1 to continue **/ public float reportRayFixture(Fixture fixture, Vector2 point, Vector2 normal, float fraction); }